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12345 [234]
3 years ago
11

Eventually, everyone must sleep due to our (1 point) need for mental rest. beta waves. biological rhythms. delta waves.

Chemistry
1 answer:
Bad White [126]3 years ago
6 0
Out of the available answers, the most likely correct would be that eventually everyone must sleep due to our need for mental rest. However, it is not as simple as this, as all of the processes implicated with mental rest (including the restoration of biological rhythms as mentioned in an alternative answer) cannot necessarily be summed up in this way.
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Find the iupac name for this question​
Vanyuwa [196]

Answer:

3 - Methylpent-2-yn-1-ol

8 0
3 years ago
In which substance does sulfur have a negative oxidation number?<br>Na2S<br>CaSO4<br>S<br>SO2
leonid [27]

Answer:

Na2S  

Explanation:

Na2S: Na (always +1). S (-2) in this formula

CaSO4:   Ca (always +2). O (-2). => S (+6) in CaSO4

S (0)

SO2:  O(-2) => S (+4)

Hope this answer will help you! Have a nice day!

3 0
3 years ago
What is the percent by mass of magnesium sulfate in MgSO4 · 7H2O?
Degger [83]

Answer: 48.83%

Explanation: Mass percent is the ratio of mass of the particular substance  to the total mass of given compound.

{\text {mass percentage}}=\frac{\text{mass of }MgSO_4}{\text {total mass}}\times 100\%

Mass of MgSO_4= 120g

Mass of MgSO_4.7H_2O= 246g

{\text {mass percentage}}=\frac{120g}{246g}\times 100\%=48.83\%

8 0
3 years ago
In November 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. The chunk of ice was e
il63 [147K]
<h2>Answer:</h2>

1.58  × 10∧16 pools.

<h3>Explanation:</h3>

Given:

Length of ice berg= 98 miles = 1557716 meters

Width of iceberg = 25 miles = 40233.6 meters

Thickness of iceberg = 750 ft = 230 meters

Volume of water in a swimming pool = 24,000 gallons = 90850 liters

The volume of the ice berg:

Volume = Length . width . thickness

Volume = 1557716 . 40233.6 . 230 = 1,441, 468, 016, 5248 m3 =  1,441, 468, 016, 5248 × 10 ∧3 L.

1 pool contains liters of water:  90850 liters

1,441, 468, 016, 5248 × 10 ∧3 liters contains = 1/90850 . 1,441, 468, 016, 524.8 × 10 ∧3 .

= 1.100 .  1,441, 468, 016, 5248 × 10 ∧3 L.

= 1.58  × 10∧16 pools.

Hence 1.6 × 10∧16 pools will be filled with that chunk of ice.


4 0
3 years ago
Acetone is a common solvent that has a density of 0.7899 g/mL. What volume of acetone, in milliliters, has a mass of 35.6 g?
lys-0071 [83]

Answer:

45.069 mL

Explanation:

mass/density=volume.

If we fill in the numbers provided, we would have:

35.6/0.7899=45.069

Don't forget to add your measurements!

45.069 mL

3 0
3 years ago
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